MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
145 - Table './balkania_forum/mybb_sessions' is marked as crashed and should be repaired
Query:
REPLACE INTO mybb_sessions SET `uid`=0,`sid`='b1eea1d96247cbd6ae476f26dd9f0ee9',`time`=1711712570,`ip`=X'3457c870',`location`='/showthread.php?tid=51&pid=74',`useragent`='claudebot',`location1`=6,`location2`=51,`nopermission`=0